oj.uz

Submission #847993

# Submission time Handle Problem Language Result Execution time Memory
847993 2023-09-11T00:40:47 Z resting Modern Machine (JOI23_ho_t5) C++17
25 / 100
 3000 ms 862900 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
const int mx = 1.2e5 + 5;

const int magic = 400;
//const int magic = 3;

namespace rmq {
    struct segtree {
        segtree* lc = 0, * rc = 0;
        int l, r;
        int v = numeric_limits<int>::max();
        segtree* getmem();
        segtree() : segtree(-1, -1) {};
        segtree(int l, int r) : l(l), r(r) {
            if (l == r)return;
            int m = (l + r) / 2;
            lc = getmem(); *lc = segtree(l, m);
            rc = getmem(); *rc = segtree(m + 1, r);
        };
        segtree* upd(int qi, int qv) {
            segtree* tr = getmem(); *tr = *this;
            if (qi < l || qi > r) return tr;
            if (l == r) { tr->v = qv; return tr; }
            tr->lc = lc->upd(qi, qv); tr->rc = rc->upd(qi, qv);
            tr->v = min(tr->lc->v, tr->rc->v);
            return tr;
        }
        int q(int ql, int qr) {
            if (ql > qr)return numeric_limits<int>::max();
            if (ql > r || qr < l) return numeric_limits<int>::max();
            if (ql <= l && qr >= r) return v;
            return min(lc->q(ql, qr), rc->q(ql, qr));
        }
    }mem[mx * 40]; int memsz = 0;// surely enogh?
    segtree* segtree::getmem() { return &mem[memsz++]; }
}

namespace rsq {
    struct segtree {
        segtree* lc = 0, * rc = 0;
        int l, r;
        int v = 0;
        segtree* getmem();
        segtree() : segtree(-1, -1) {};
        segtree(int l, int r) : l(l), r(r) {
            if (l == r)return;
            int m = (l + r) / 2;
            lc = getmem(); *lc = segtree(l, m);
            rc = getmem(); *rc = segtree(m + 1, r);
        };
        segtree* upd(int qi, int qv) {
            segtree* tr = getmem(); *tr = *this;
            if (qi < l || qi > r) return tr;
            if (l == r) { tr->v += qv; return tr; }
            tr->lc = lc->upd(qi, qv); tr->rc = rc->upd(qi, qv);
            tr->v = tr->lc->v + tr->rc->v;
            return tr;
        }
        int q(int ql, int qr) {
            if (ql > qr) return 0;
            if (ql > r || qr < l) return 0;
            if (ql <= l && qr >= r) return v;
            return lc->q(ql, qr) + rc->q(ql, qr);
        }
    }mem[mx * 80]; int memsz = 0;// surely enogh?
    segtree* segtree::getmem() { return &mem[memsz++]; }
}

struct bit {
    vector<int> b, a;
    vector<pair<int, int>> us;
    bit(int n) : b(n + 1, 0), a(n + 1, 0) {};
    int q(int i) { int v = 0; for (i++; i > 0; i -= i & -i) v += b[i]; return v; }
    void u(int i, int v) { us.push_back({ i, v });if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
    void u(int l, int r, int v) { if (l > r) return; u(l, v);  u(r + 1, -v); }
};

int holy[mx / magic][mx];


int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    int n, m; cin >> n >> m;
    string c; cin >> c;
    vector<int> a(m); for (auto& x : a) { cin >> x;  x--; }
    vector<vector<int>> a2(n + 1);
    for (int i = 0; i < m; i++) a2[a[i]].push_back(i);
    vector<int> ls, rs;
    ls.push_back(-1); rs.push_back(n);
    for (int i = 0; i < n; i++) if (c[i] == 'B') ls.push_back(i);
    for (int i = n - 1; i >= 0; i--) if (c[i] == 'R') rs.push_back(i);

    vector<int> pre(n, 0);
    for (int i = 0; i < n; i++) {
        if (i) pre[i] = pre[i - 1];
        pre[i] += c[i] == 'R';
    }

    auto sm = [&](int l, int r) {
        if (l > r) return 0LL;
        if (l > n) l = n;
        if (r > n - 1) r = n - 1;
        if (r < 0) return 0LL;
        if (l <= 0) return pre[r];
        return pre[r] - pre[l - 1];
    }; //very necessary yk

    rmq::segtree* tmp = new rmq::segtree(0, n - 1);
    vector<rmq::segtree*> ac(m, 0);
    for (int i = m - 1; i >= 0; i--) {
        ac[i] = tmp = tmp->upd(a[i], i);
    }

    rsq::segtree* tmp2 = new rsq::segtree(0, m - 1);
    vector<rsq::segtree*> ac2(n + 1, 0);
    for (int i = 0; i <= n; i++) {
        for (auto& x : a2[i]) tmp2 = tmp2->upd(x, i + 1);
        ac2[i] = tmp2;
    }

    rsq::segtree* tmp3 = new rsq::segtree(0, m - 1);
    vector<rsq::segtree*> ac3(n + 1, 0);
    for (int i = n; i >= 0; i--) {
        for (auto& x : a2[i]) {
            tmp3 = tmp3->upd(x, n - 1 - i);
        }
        ac3[i] = tmp3;
    }

    bit die(n + 1);
    for (int i = 0; i <= n; i++) die.u(i, i, i);
    die.us.clear();
    for (int j = 0; j + magic <= m; j += magic) {
        int k = j / magic;
        for (int x = j; x < j + magic; x++) {
            int cur = 0;
            while (cur <= n) {
                int i = die.q(cur) / (n + 1);
                int l = cur - 1, r = n + 1;
                while (r - l > 1) {
                    int m = l + (r - l) / 2;
                    if (die.q(m) / (n + 1) == i) l = m;
                    else r = m;
                }
                //[cur, l] is bound
                int l2 = cur - 1, r2 = l + 1;
                while (r2 - l2 > 1) {
                    int m = l2 + (r2 - l2) / 2;
                    if (die.q(m) % (n + 1) <= a[x]) l2 = m;
                    else r2 = m;
                }
                //r is bound
                die.u(cur, l2, 1);
                cur = l + 1;
            }
            die.u(0, n, a[x] + 1);
        }
        int ps = 0;
        for (int i = 0; i <= n; i++) {
            ps += die.a[i];
            holy[k][i] = ps % (n + 1);
        }
        for (auto& x : die.us)die.u(x.first, -x.second);
        die.us.clear();
    }

    int q; cin >> q;

    while (q--) {
        int l, r; cin >> l >> r; l--;r--;
        //solve
        int li = -1, ri = n;
        int cur = l;
        auto qcnt = [&](int l, int r) {
            int res = 0;
            if (l > r) return 0LL;
            if (r <= li) return r - l + 1;
            if (l >= ri) return 0LL;
            if (l <= li) {
                res += li - l + 1;
                l = li + 1;
            }
            if (r >= ri) r = ri - 1;
            return res + sm(l, r);
            //LMAO
        };

        auto qcnt2 = [&](int l, int r) {
            if (l > r) return 0LL;
            return (r - l + 1) - qcnt(l, r);};

        auto thing = [&](int t) { // should work for everything?
            int a = qcnt(0, t - 1) * 2 + 1;
            int b = qcnt2(t + 1, n - 1) * 2;
            if (a > b) {
                int ll = 0 - 1, rr = t + 1;
                while (rr - ll > 1) {
                    int m = ll + (rr - ll) / 2;
                    if (qcnt(m, t - 1) * 2 + 1 >= b)ll = m;
                    else rr = m;
                }
                ri = min(ri, ll);
                if (li >= ri) li = ri - 1;
            } else {
                int ll = t, rr = n;
                while (rr - ll > 1) {
                    int m = ll + (rr - ll) / 2;
                    if (qcnt2(t + 1, m) * 2 >= a)rr = m;
                    else ll = m;
                }
                li = rr;
                if (ri <= li) ri = li + 1;
            }
        };

        auto test = [&](int t) -> bool {
            int v1 = li == -1 ? 0 : ac2[li]->q(cur, t);
            int v2 = ri == n ? 0 : ac3[ri]->q(cur, t);
            int tmp1 = prev(upper_bound(ls.begin(), ls.end(), li)) - ls.begin();
            int tmp2 = prev(upper_bound(rs.begin(), rs.end(), ri, greater<int>())) - rs.begin();
            if (tmp1 + v1 >= ls.size()) return false;
            if (tmp2 + v2 >= rs.size()) return false;
            int nl = v1 ? ls[tmp1 + v1] : li;
            int nr = v2 ? rs[tmp2 + v2] : ri;
            if (nl >= nr) return false;
            li = nl; ri = nr;
            cur = t + 1;
            return true;
        };

        while (cur <= r) {
            int t = min(ac[cur]->q(li + 1, ri - 1), r + 1);
            //do the thing?
            if (!test(t - 1)) break;
            if (cur <= r)thing(a[cur++]);
        }
        if (cur <= r) {
            int t = min(ac[cur]->q(li + 1, ri - 1), r + 1);
            for (int i = 18; i >= 0; i--) {
                if (cur + (1 << i) <= t - 1) test(cur + (1 << i));
            }
        }

        for (int i = 0; i < 5; i++) if (cur <= r) thing(a[cur++]);
        int nxt = (cur / magic + 1) * magic;
        while (cur <= r) {
            if (cur == nxt && cur + magic <= r + 1) {
                ri = holy[cur / magic][ri];
                li = ri - 1;
                cur += magic;
                nxt = (cur / magic + 1) * magic;
            } else {
                if (a[cur] >= ri) ri++;
                ri += a[cur] + 1;
                while (ri >= n + 1) ri -= (n + 1);
                li = ri - 1;
                cur++;
            }
        }
        cout << qcnt(0, n - 1) << endl;
    }
}

Compilation message

Main.cpp: In member function 'void bit::u(long long int, long long int)':
Main.cpp:77:57: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     void u(int i, int v) { us.push_back({ i, v });if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
      |                                                       ~~^~~~~~~~~~
Main.cpp:77:92: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |     void u(int i, int v) { us.push_back({ i, v });if (i < a.size()) a[i] += v; for (i++; i < b.size(); i += i & -i) b[i] += v; }
      |                                                                                          ~~^~~~~~~~~~
Main.cpp: In lambda function:
Main.cpp:224:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  224 |             if (tmp1 + v1 >= ls.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~
Main.cpp:225:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  225 |             if (tmp2 + v2 >= rs.size()) return false;
      |                 ~~~~~~~~~~^~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 564560 KB Output is correct
2 Correct 77 ms 564348 KB Output is correct
3 Correct 76 ms 564560 KB Output is correct
4 Correct 75 ms 564560 KB Output is correct
5 Correct 77 ms 564560 KB Output is correct
6 Correct 76 ms 564560 KB Output is correct
7 Correct 75 ms 564560 KB Output is correct
8 Correct 77 ms 564560 KB Output is correct
9 Correct 77 ms 564560 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 564560 KB Output is correct
2 Correct 77 ms 564348 KB Output is correct
3 Correct 76 ms 564560 KB Output is correct
4 Correct 75 ms 564560 KB Output is correct
5 Correct 77 ms 564560 KB Output is correct
6 Correct 76 ms 564560 KB Output is correct
7 Correct 75 ms 564560 KB Output is correct
8 Correct 77 ms 564560 KB Output is correct
9 Correct 77 ms 564560 KB Output is correct
10 Correct 86 ms 582096 KB Output is correct
11 Correct 89 ms 582192 KB Output is correct
12 Correct 91 ms 582216 KB Output is correct
13 Correct 85 ms 582104 KB Output is correct
14 Correct 85 ms 582096 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 564560 KB Output is correct
2 Correct 77 ms 564348 KB Output is correct
3 Correct 76 ms 564560 KB Output is correct
4 Correct 75 ms 564560 KB Output is correct
5 Correct 77 ms 564560 KB Output is correct
6 Correct 76 ms 564560 KB Output is correct
7 Correct 75 ms 564560 KB Output is correct
8 Correct 77 ms 564560 KB Output is correct
9 Correct 77 ms 564560 KB Output is correct
10 Correct 86 ms 582096 KB Output is correct
11 Correct 89 ms 582192 KB Output is correct
12 Correct 91 ms 582216 KB Output is correct
13 Correct 85 ms 582104 KB Output is correct
14 Correct 85 ms 582096 KB Output is correct
15 Correct 76 ms 564560 KB Output is correct
16 Correct 74 ms 564468 KB Output is correct
17 Correct 77 ms 564560 KB Output is correct
18 Correct 528 ms 861624 KB Output is correct
19 Correct 574 ms 861568 KB Output is correct
20 Correct 633 ms 861860 KB Output is correct
21 Correct 723 ms 862900 KB Output is correct
22 Correct 597 ms 861784 KB Output is correct
23 Correct 577 ms 861716 KB Output is correct
24 Correct 451 ms 861308 KB Output is correct
25 Correct 450 ms 861200 KB Output is correct

Subtask #4
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564396 KB Output is correct
2 Execution timed out 3041 ms 849240 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564396 KB Output is correct
2 Execution timed out 3041 ms 849240 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 564396 KB Output is correct
2 Execution timed out 3041 ms 849240 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 92 ms 564560 KB Output is correct
2 Correct 77 ms 564348 KB Output is correct
3 Correct 76 ms 564560 KB Output is correct
4 Correct 75 ms 564560 KB Output is correct
5 Correct 77 ms 564560 KB Output is correct
6 Correct 76 ms 564560 KB Output is correct
7 Correct 75 ms 564560 KB Output is correct
8 Correct 77 ms 564560 KB Output is correct
9 Correct 77 ms 564560 KB Output is correct
10 Correct 86 ms 582096 KB Output is correct
11 Correct 89 ms 582192 KB Output is correct
12 Correct 91 ms 582216 KB Output is correct
13 Correct 85 ms 582104 KB Output is correct
14 Correct 85 ms 582096 KB Output is correct
15 Correct 76 ms 564560 KB Output is correct
16 Correct 74 ms 564468 KB Output is correct
17 Correct 77 ms 564560 KB Output is correct
18 Correct 528 ms 861624 KB Output is correct
19 Correct 574 ms 861568 KB Output is correct
20 Correct 633 ms 861860 KB Output is correct
21 Correct 723 ms 862900 KB Output is correct
22 Correct 597 ms 861784 KB Output is correct
23 Correct 577 ms 861716 KB Output is correct
24 Correct 451 ms 861308 KB Output is correct
25 Correct 450 ms 861200 KB Output is correct
26 Correct 76 ms 564396 KB Output is correct
27 Execution timed out 3041 ms 849240 KB Time limit exceeded
28 Halted 0 ms 0 KB -